Data storage unit failure condition responding method and system

Abstract: A data storage unit failure condition responding method and system is proposed, which is designed for use in conjunction with an access control interface that is coupled between a computer system and a data storage unit for responding to an event of a failure condition in the data storage unit; and which is characterized by the capability of storing all subsequently received access commands into a queuing buffer in the event of a failure condition in the data storage unit and putting the access control interface in a waiting state until the failed data storage unit resumes normal operating condition to process each queued access command, rather than still try to process the access commands and result in unsuccessful access operations as in the case of the prior art. This feature can help ensure the overall network data processing efficiency.